hard magnet編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看hard magnethard magnet — 名詞名詞1. a magnet that retains its magnetism after magnetization1.名詞釋義永久磁鐵a magnet that retains its magnetism after magnetization例句A hard magnet is used in speakers to maintain a constant magnetic field.